Yes, clean windows do let more light in. Over time, windows can accumulate dirt, dust, smudges, and grime, which can reduce the amount of natural light that enters a room. When windows are dirty, they can create a film or layer that obstructs the passage of light, resulting in a dimmer and less vibrant interior. Regularly cleaning windows removes these obstructions, allowing more light to penetrate into the space. Clean windows also enhance the overall aesthetic appeal of a room, making it feel brighter, more open, and inviting. So, if you want to maximize natural light and create a brighter atmosphere in your home or workspace, keeping your windows clean is essential.